What kind of sea is there on the Dalian side?

Bordering the Yellow Sea to the east and the Bohai Sea to the west.

The Bohai Sea is China's northernmost offshore sea, and is the internal sea of the People's Republic of China*** and the State of China, as well as belonging to the category of internal water. The Bohai Sea is composed of Liaodong Bay, Bohai Bay, Laizhou Bay and the Central Sea Basin, and the main rivers entering the sea are the Yellow River, Liao River, Luan River and Hai River, with a total annual runoff of 88.8 billion cubic meters.

The Yellow Sea is a fringe sea surrounding between China and South Korea, a semi-enclosed sea with an approximate north-south orientation. It is bounded in the northwest by a line connecting Cape Lao Tieshan at the southern end of the Liaodong Peninsula with Cape Penglai on the northern coast of the Shandong Peninsula, and the Bohai Sea; in the south by a line connecting Qidong Mouth on the northern coast of the mouth of the Yangtze River in China with the southwestern corner of the island of Jeju, and the East China Sea.

Geographic location of Dalian:

Dalian, also known as Bin Cheng, the old name of Darini, Qing Naiwa, is a sub-provincial city in Liaoning Province, a planned city. Located at the southern tip of Liaodong Peninsula in Liaoning Province, on the coast of the Yellow Bohai Sea, backed by the hinterland of Northeast China, and the Shandong Peninsula across the sea, it is an important economic, trade, port, industrial and tourist city on the eastern coast of China, and a new first-tier city.

Dalian is located at the southern tip of Liaodong Peninsula, between 38°43′~40°12′ north latitude and 120°58′~123°31′ east longitude. It is bordered by the Yellow Sea to the east, the Bohai Sea to the west, the Shandong Peninsula to the south, and the vast Northeast Plain to the north, with the entire topography being high in the north and low in the south, wide in the north and narrow in the south.

The city has a total land area of 12,573.85 square kilometers, of which 2,414.96 square kilometers in the urban area and 10,158.89 square kilometers in the counties (cities) under the jurisdiction of the city (including Pulandian District). The city's coastline is 2,211 kilometers long, of which 1,371 kilometers of mainland coastline, island coastline 840 kilometers.

Baidu Encyclopedia-Dalian